Frensham is a village in Surrey, England, next to the A287 road, 13 miles (20.9 km) WSW of Guildford, the county town.

In 688 AD, King Caedwalla of Wessex made a charter conveying to the Catholic church 60 hides of land that included Farnham, Frensham and Churt.

Frena was the name of either a Danish Earl who was killed in the battle of Ashdown in the year 871, or of a Saxon who was driven south from Northumberland by the Danes in 993.

[4] Frensham includes the neighbourhood or locality, largely separated by a small green buffer, Rushmoor or Rush Moor.

The Bishop of Winchester managed to retain ownership of most of his historic Farnham estate including most manors in the south until the 19th century.

Originally a chapelry of Farnham, the present St Mary's Church was dedicated in 1239, having been moved from its previous site on low ground beside the River Wey.

The move was probably due to the massive storms of the 1230s which flooded Waverley Abbey, 3.7 miles (6.0 km) downstream, to a depth of 5 feet 8 inches (1.73 m).

The chancel is the oldest part of the church, its walls being those of the original building, the 13th-century niches, piscina and aumbry.

The exterior of the building is of local sandstone, flint and rubble, with evidence of endless repair and reconstruction.

The occasional presence of blue-green algae means that official advice regarding swimming varies, as indicated by notices at the water's edge.